Java enum: Creating an Enum : Enum « Language Basics « Java

Java enum: Creating an Enum

Java enum: Creating an Enum

License for Java 1.5 'Tiger': A Developer's Notebook
     (O'Reilly) example package

Java 1.5 'Tiger': A Developer's Notebook (O'Reilly) 
by Brett McLaughlin and David Flanagan.
ISBN: 0-596-00738-8

You can use the examples and the source code any way you want, but
please include a reference to where it comes from if you use it in
your own products or services. Also note that this software is
provided by the author "as is", with no expressed or implied warranties. 
In no event shall the author be liable for any direct or indirect
damages arising in any way out of the use of this software.


enum Grade { A, B, C, D, F, INCOMPLETE };

class Student {

  private String firstName;
  private String lastName;
  private Grade grade;

  public Student(String firstName, String lastName) {
    this.firstName = firstName;
    this.lastName = lastName;

  public void setFirstName(String firstName) {
    this.firstName = firstName;

  public String getFirstName() {
    return firstName;

  public void setLastName(String lastName) {
    this.lastName = lastName;

  public String getLastName() {
    return lastName;

  public String getFullName() {
    return new StringBuffer(firstName)
           .append(" ")

  public void assignGrade(Grade grade) {
    this.grade = grade;

  public Grade getGrade() {
    return grade;

public class GradeTester {

  private Student student1, student2, student3;

  public GradeTester() { 
    student1 = new Student("Brett", "McLaughlin");
    student2 = new Student("Ben", "Rochester");
    student3 = new Student("Dennis", "Erwin");

  public void testGradeAssignment(PrintStream out) throws IOException {

  public void listGradeValues(PrintStream out) throws IOException {
    Grade[] gradeValues = Grade.values();

    // for loop
    for (int i=0; i<gradeValues.length; i++) {
      out.println("Allowed value: '" + gradeValues[i] + "'");

    // for/in loop
    for (Grade g : gradeValues ) {
      out.println("Allowed value: '" + g + "'");

  public void testSwitchStatement(PrintStream out) throws IOException {
    StringBuffer outputText = new StringBuffer(student1.getFullName());

    switch (student1.getGrade()) {
      case A: 
        outputText.append(" excelled with a grade of A");
      case B: // fall through to C
      case C: 
        outputText.append(" passed with a grade of ")
      case D: // fall through to F
      case F:
        outputText.append(" failed with a grade of ")
      case INCOMPLETE:
        outputText.append(" did not complete the class.");
        outputText.append(" has a grade of ")


  public static void main(String[] args) {
    try {
      GradeTester tester = new GradeTester();
    } catch (Exception e) {

Related examples in the same category

1.How to use enum
2.Enum with switch statement
3.Enum and GenericEnum and Generic
4.Media enumeration constantsMedia enumeration constants
5.Use an enum constructor.
6.Switching on Enum and Adding Methods to an Enum
7.An enumeration of apple varieties. An enumeration of apple varieties.
8.Use the built-in enumeration methods. Use the built-in enumeration methods.
9.Use an enum constructor, instance variable, and method. Use an enum constructor, instance variable, and method.
10.Java enum: Demonstrate ordinal(), compareTo(), and equals().Java enum: Demonstrate ordinal(), compareTo(), and equals().
11.Java enum: EnumMap and Ant statusJava enum: EnumMap and Ant status
12.Java enum: Enum inside class
13.Java enum and varargs
14.This program demonstrates enumerated types
15.Shuffler Enum